The ruins collapsed behind them in a storm of black stone and blue fire.

Eva barely kept her footing as Acheron dragged her across the shattered platform. The moment his hand closed around her arm, heat slammed through her body again so violently it nearly knocked the breath from her lungs.

It made no sense.

He was supposed to feel cold.

He looked cold. Like winter carved into human shape.

And yet every time he touched her, something inside her reacted like wildfire catching dry wood.

Acheron released her abruptly the second they reached the far edge of the ruins.

As if touching her for too long hurt him.

Interesting.

Also deeply concerning.

“Stay behind me,” he ordered.

Eva stared at him.

“Oh, now you’re interested in keeping me alive?”

The silver in his eyes flashed dangerously.

“You speak too much.”

“And you avoid answering questions. We all have flaws.”

Another explosion shook the mountain.

A massive crack ripped through the altar platform behind them as black smoke poured upward from beneath the earth. The guardians immediately formed a defensive circle around the widening abyss.

Something enormous moved beneath the darkness.

Eva could hear it now.

Breathing.

Slow.

Heavy.

Wrong.

The sound made her skin crawl.

Acheron stepped forward, shadows gathering violently around him.

The entire atmosphere shifted the moment he moved.

The storm bent toward him.

The darkness obeyed him.

Even the guardians lowered their heads instinctively as silver-blue light spread beneath his boots.

For the first time since arriving at the ruins, Eva truly understood what he was.

Not a king.

Not a monster.

A god.

Acheron raised one gloved hand toward the collapsing altar.

The shadows exploded outward instantly.

Black tendrils shot through the ruins like spears, wrapping around falling stone and forcing the shattered structure back together piece by piece. The sound of grinding rock echoed across the mountain as the altar slowly pulled itself into place again.

Eva stared openly.

“That,” she said faintly, “is mildly horrifying.”

No response.

Acheron’s attention remained fixed on the abyss.

The pressure radiating from him grew heavier by the second. Frost spread across the stone beneath his feet in sharp crystalline patterns.

Then the thing beneath the mountain roared again.

This time the guardians flinched.

Actually flinched.

Eva’s stomach tightened.

The shadows surrounding the altar suddenly snapped apart.

A massive skeletal hand burst from the darkness below.

Eva jumped backward with a strangled noise.

“Oh, absolutely not.”

The creature dragged itself upward slowly, enormous bones wrapped in black smoke and dripping blue fire. Empty eye sockets glowed faintly beneath a cracked skull large enough to crush a horse.

One of the guardians hissed, “A Devourer.”

Wonderful.

The name alone sounded catastrophic.

The creature lunged toward the altar with horrifying speed.

Acheron moved instantly.

One second he stood beside Eva.

The next he stood directly in front of the monster.

Shadows erupted around him like a living storm.

The Devourer swung one enormous skeletal arm downward—

And froze midair.

The entire mountain shook violently as Acheron caught the creature’s attack with one hand.

One hand.

Eva stared in disbelief.

The God of Death looked almost bored.

Blue fire reflected across his pale face as his silver eyes darkened.

“You were not summoned,” he said calmly.

The creature screamed.

Not roared.

Screamed.

The sound split through the storm like tearing metal.

Then Acheron closed his hand.

The Devourer disintegrated instantly.

Bone exploded into ash.

Blue fire vanished.

And within seconds, nothing remained except black dust scattering across the wind.

Silence crashed over the ruins.

Eva slowly looked from the drifting ash back toward Acheron.

“…Right,” she said quietly. “That feels important.”

The guardians immediately dropped to one knee again.

None of them looked surprised.

Apparently this was simply a normal Tuesday for the Underworld.

Acheron turned back toward the altar.

The silver markings across the black stone now burned brighter than before. The blood Eva had spilled earlier had spread through every carved line like glowing veins.

Something about it made her uneasy.

Very uneasy.

Acheron approached the altar slowly.

The shadows around him had become unstable again, twisting sharply whenever his gaze flicked toward her.

He noticed it too.

That seemed to irritate him.

Good.

Eva preferred when cosmic entities were at least slightly inconvenienced.

“My Lord,” one guardian said carefully, “the contract has awakened.”

“I know.”

“The mortal must be bound before the veil destabilizes again.”

Eva immediately frowned.

“I dislike the phrasing of that sentence.”

Acheron ignored her.

Which was becoming a pattern she deeply resented.

He stopped directly beside the altar and extended one gloved hand toward her.

“Come here.”

Eva did not move.

“I would first like clarification regarding the words bound and destabilize.”

“You no longer possess the luxury of negotiation.”

“That is not clarification.”

The shadows around him twitched violently.

Definitely irritated.

Acheron’s gaze settled fully on her again.

The force of it felt physical somehow.

“You crossed the Gate willingly,” he said. “The Underworld recognized your offering. The contract is unfinished.”

“And if I refuse?”

A pause.

Then:

“You die.”

Eva blinked once.

“Well. That feels unnecessarily dramatic.”

“The fracture between realms will consume your soul.”

“…Less dramatic than I hoped.”

One of the guardians looked vaguely offended by her tone again.

Eva was beginning to enjoy that.

The storm overhead rumbled heavily.

Acheron’s expression remained cold, but something sharper now lingered beneath it. Tension. Impatience. Maybe even restraint.

As if standing this close to her required effort.

Interesting.

Dangerous.

Possibly useful later.

Eva looked toward the glowing altar.

“What exactly happens if I agree to this contract?”

“You become bound to the Underworld until the debt is fulfilled.”

“And the debt is?”

“Your sister’s life.”

The answer hit harder than she expected.

For a brief moment, Solaria’s face flashed through her mind.

Her weak smile.

The dark veins beneath pale skin.

The way her breathing had started rattling during the last week.

Eva closed her eyes briefly.

Damn him for making this simple.

When she opened them again, Acheron was still watching her with that same unreadable expression.

No pity.

No compassion.

Just absolute certainty.

As though human desperation was something he saw every day.

Maybe he did.

Eva stepped toward the altar.

“Fine,” she said quietly. “Tell me what to do.”

The guardians shifted immediately.

Blue fire surged higher through the carvings.

Acheron extended his hand toward her again.

This time, she noticed something strange.

He hesitated.

Barely noticeable.

But there.

Like he disliked the idea of touching her again.

Or worse—

Wanted to.

Eva slowly placed her bleeding palm into his gloved hand.

The reaction was immediate.

The entire mountain exploded with silver-blue light.

Pain shot through her arm as glowing symbols spiraled across her skin like burning chains. The altar beneath them cracked open again, releasing waves of shadow and frost into the storm.

Eva gasped sharply.

Acheron’s jaw tightened visibly.

The silver in his eyes flashed bright blue.

The shadows around them lost control entirely.

They wrapped around Eva instinctively, curling around her wrists and ankles like living things desperate to hold onto her.

The guardians lowered themselves fully to the ground.

“The contract is witnessed,” one whispered.

“The mortal is bound.”

Heat flooded through Eva’s chest violently.

Not pain.

Connection.

She could feel him.

Not thoughts.

Not words.

Presence.

Ancient.

Cold.

Endless.

And beneath all of that—

Hunger.

Acheron released her hand immediately.

Too quickly.

As though the contact had burned him.

The glowing marks faded slowly beneath Eva’s skin, disappearing near her wrist like silver ink sinking underwater.

Silence followed.

The storm had stopped completely now.

Snow drifted softly across the ruins instead of rain.

Eva looked down at her hand, breathing unevenly.

Then she looked back up at the God of Death.

“So,” she said carefully, “how worried should I be about whatever just happened?”

Acheron stared at her for a very long moment.

His expression had become unreadable again.

But the shadows behind him still moved restlessly toward her.

Like starving things.

Finally, he spoke.

“You belong to the Underworld now, Evangeline Sol.”

And somehow, the way he said her name sounded less like a statement—

And more like the beginning of a problem neither of them could undo.